Synthesis of bismuthanyl-substituted monomeric triel hydrides

Area of Science:

• Organometallic Chemistry
• Main Group Chemistry
• Inorganic Synthesis

Background:

• Bismuthanylboranes and bismuthanylgallanes are rare molecular compounds.
• Understanding compounds with 2-center, 2-electron (2c-2e) bonds is crucial in chemistry.

Purpose of the Study:

• To synthesize and characterize novel bismuthanylborane monomers stabilized by donor ligands.
• To investigate the synthesis and properties of the first bismuthanylgallane.
• To explore the electronic nature and stability of these unique compounds.

Main Methods:

• Salt metathesis reactions using D·BH2I and KBi(SiMe3)2(THF)0.3.
• Synthesis of bismuthanylgallane via reaction of IDipp·GaH2(SO3CF3) with KBi(SiMe3)2(THF)0.3.
• Characterization using single crystal X-ray structure determination, NMR spectroscopy, and mass spectrometry.

Main Results:

• Successful synthesis of bismuthanylborane monomers (D·BH2Bi(SiMe3)2) and bismuthanylgallane (IDipp·GaH2Bi(SiMe3)2).
• These compounds feature rare 2c-2e B-Bi bonds.
• Products exhibit high sensitivity to air, light, and decompose in solution even at low temperatures.

Conclusions:

• The study presents the first examples of bismuthanylboranes and bismuthanylgallanes stabilized by donor ligands.
• These compounds provide rare molecular examples of 2c-2e B-Bi bonding.
• Computational studies offer insights into the stability and electronic properties of these novel organometallic compounds.